Tomcat Throwing error

[Dean Chester]

Tomcat6 keeps throwing this error and i don't understand it:
27-Jul-2009 11:03:26 org.apache.jasper.runtime.JspFactoryImpl internalGetPageContext
SEVERE: Exception initializing page context
java.lang.IllegalStateException: Cannot create a session after the response has been committed
If anyone can help then let me know
Thanks in adavance.

[Vijitha Kumara]

java.lang.IllegalStateException: Cannot create a session after the response has been committed

Can you show us the code relete to this which will help to resolve (as the error message gives some idea about it) ?

[Dean Chester]

I think its this as if i change the Boolean variable it doesn't throw the error yet doesn't work

  HttpSession ses = req.getSession(false);  

[Vijitha Kumara]

What is there before the given statement? You may have commited the response already ?

[Dean Chester]

   public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) servletRequest;

        // if there is no username, then they have not gone through
        // the login, so kick them to the login page
      try{
       HttpSession ses = req.getSession(false); // null if no current   

This is all there is.

[Dean Chester]

LAter on in the error report it says that this line in the code is the problem. If this helps.

  filterChain.doFilter(servletRequest, servletResponse);   

[Bosun Bello]

Looks like the response was commited, and then you tried to do a redirect or forward.